ENDOCRINE SYSTEM

HYPOTHALAMUS

RED- PITUITARY

VIOLET-INFUNDIBULUM

ORANGE-

HYPOTHALAMUS

PITUITARY GLAND

PITUITARY GLAND

infundibular stalk (IS); pars nervosa (PN); pars distalis

(PD); pars intermediate (PI); and pars tuberalis (PT)

THYMUS

Each lobule of this gland has a darker staining cortex (left A) and a lighter staining medulla (left B). One outstanding feature of this organ is the presence of thymic roses/thymic corpuscles (C). This organ, large until adolescence, is important for the development of the immune system. The hormone produced by this gland is thymosin.

THYROID GLAND

The lumen (L) of each follicle is surrounded by a simple

epithelium in which the cell height ranges from squamous

to low columnar. Also present are large pale-staining

parafollicular or C cells (C).

RED – Follicle

with colloid

BLUE – Follicular

cells

PINK -

Connective tissue

septa

PARATHYROID GLAND

RED - Chief Cells

RED – Oxyphil cells

ADRENAL GLAND

CAPSULE

ZONA FASCICULATA

ZONA GLOMERULOSA

ZONA RETICULARIS

MEDULLA

CORTEX

CORTEX

RED – Cells of the

medulla

BLUE – Cells of the

zona reticularis

GREEN –

Sympathetic

ganglion cells

MEDULLA

FEMALE REPRODUCTIVE

EGG CELL

EGG CELL

MALE REPRODUCTIVE

Arrows shows the location of the leydig cells

1 Lumen of Tubulus

seminiferus contortus

2 spermatids

3 spermatocytes

4 spermatogonia

5 Sertoli cell

6 Myofibroblasts

7 Leydig cells

8 capillaries

TESTIS

PINEAL GLAND

EPIPHYSIS (PINEAL GLAND)

Stained with haematoxylin and eosin

1 - pinealocytes

2 - pineal sand (salts of calcium, magnesium and silicon

ALIMENTARY

STOMACH

STOMACH

DUODENUM

LIVER

PANCREAS

PANCREAS